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Regular and Irregular Polygons Worksheet

Understand and identify regular and irregular polygons, their properties, and angle calculations.

Grade 9 Math GeometryRegular and Irregular Polygons
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Includes

Multiple ChoiceFill in the BlanksTrue / FalseShort AnswerLong Answer

Standards

CCSS.MATH.CONTENT.HSG.CO.A.1CCSS.MATH.CONTENT.HSG.GPE.B.7

Topics

geometrypolygonsregular polygonsirregular polygonsgrade 9
7 sections · Free to use · Printable
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Regular and Irregular Polygons

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Read each question carefully and answer to the best of your ability. Show all your work for calculation problems.

1. Which of the following statements is true for a regular polygon?

a

All sides are equal in length, but angles may differ.

b

All angles are equal in measure, but sides may differ.

c

All sides are equal in length, and all angles are equal in measure.

d

It must have at least one right angle.

2. An irregular polygon is defined by:

a

Having all sides equal.

b

Having all angles equal.

c

Sides and angles are not all equal.

d

Having at least five sides.

3. A polygon with all equal sides and all equal angles is called a   polygon.

4. The sum of the interior angles of a polygon with 'n' sides is given by the formula (n - 2) *   degrees.

5. A polygon that is not regular is called an   polygon.

6. All squares are regular polygons.

T

True

F

False

7. A rectangle is always a regular polygon.

T

True

F

False

8. Draw an example of a regular hexagon and label its sides and angles.

SideAngle

9. Draw an example of an irregular quadrilateral and explain why it is irregular.

10. A regular octagon has sides of length 7 cm. Calculate the sum of its interior angles and the measure of each interior angle.

11. Explain the key differences between a regular polygon and an irregular polygon, providing examples of each.